Doomsday Book by Connie Willis is about time travel, or so it seems. What it really is about is people, and plagues, and compassion. Kivrin is a historian who travels back to England at the time of the black death. After she has left a serious influenza epidemic breaks out in her own time too. We follow the two time lines through the book. Doomsday Book won the Hugo, the Locus SF and the Nebula prizes and was shortlisted for other awards.
Mr. Dunworthy opened the door to the laboratory and his spectacles promptly steamed up.
“Am I too late?” he said, yanking them off and squinting at Mary.
“Shut the door,” she said. “I can’t hear you over the sound of those ghastly carols.”
Dunworthy closed the door, but it didn’t completely shut out the sound of “O, Come All Ye Faithful” wafting in from the quad. “Am I too late?” he said again.